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(No Model.) 2 Sheets-Sheet 1. H G WEEDEN AUTOMATIC PLUSHING DEVICE.

Patented Nov. 26, 1889.

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2 Sheets-Sheet 2.

Patented Nov. 26, 1889.

H G WEEDEN AUTOMATIC FLUSHING DEVICE.

(No Model.)

WITNESSES.

' zaw/ ijzwm 'WNITED STATES PATENT OFFICE.

HENRY O. IVEEDEN, OF BOSTON, MASSACHUSETTS. ASSIGNOR TO THE IYEEDEN SANITARY MANUFACTURING COMPANY, OF RHODE ISLAND.

AUTOMATIC FLUSHING DEVICE.

SPECIFICATION forming part of Letters Patent No. 416,140, dated November 26,1889.

Application filed May 25,1889. Serial No. 312,070. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY O. IVEEDEN, of Boston, in the county of Suffolk and State of Massachusetts, a citizen of the United States, have invented certain new and useful I1nprovenlents in Automatic Flushing Devices for Slop-Hoppers, Urinals, and Similar Structures, of which the following is a specification.

The object of my invention is to produce, in connection with the ordinary flushing-tank or analogous structure for holding a supply of flushing-water and the bowl to be flushed, a combination of devices whereby the operation of flushing the bowl shall be automaticthat is to say, shall occur whenever the bowl is used and in consequence of its use.

In the accompanying drawings I have represented an embodiment of my present improvement as applied to two forms of bowl to be flushed, and I will now proceed to describe the structures therein represented.

In the drawings, A represents a flushingtank of ordinary construction, and I have shown in connection with it the customary supply-pipe and ball-cock.

B represents a flushing-pipe which extends from the tank to the bowl to be flushed. (Marked O.) The upper end of this flushingpipe is to have a siphon-connection witht-he water in the tank. I believe that the simplest and best way of providing this siphon-conneotion is, as represented in the drawings, by curving the fiushing-pipe itself at its upper end to form a siphon, as shown.

D represents an outlet-pipe from the bowl. This outlet-pipe I join with the long leg of the flushing-siphon by means of an air-pipe E, andI place a suitable back-air cut-off in the flushing-pipe on the bowl side of the point of entrance of the air-pipe. This back-air cut-off may be an ordinary trap-bend in the flushing-pipe, as shown in Figure l at F, or it may be a flap-valve, as shown at E in Fig. 2. As the function of this back-air cut-01f is to prevent the passage of air from the bowl to the air-pipe E, it is obvious that either a water seal or a mechanical seal may be employed which will permit flushing water to descend through the pipe to the bowl and yet will prevent air from passing in the other direction.

In connection with the outlet-pipe, I form upon the bowl side of the point of entrance of the air-pipe E an aircut-oif d, to cut off the passage of air from the bowl through the outlet-pipe. This may be in the form of a water 5 5 trap, as shown in Fig. 1, or a floatvalve. (Shown in Fig. 2.) I also provide a second air cut-off d in connection with the outletpipe and at a point upon the sewer side of the point of juncture with it of the air-pipe. This I preferably make in the form of an S-bend, thereby forming in connection with the outlet-pipe a siphon, as in Fig. 1.- The air outoff may, however,be conveniently formed by simply dipping the end of the pipe in a body of water, as shown in Fig. 2. The outlet-pipe at its lower end may connect with any suitable pipe leading to the sewer or other waste-re ceptacle.

The operation of the device is as follows: \Vhen the apparatus is at rest, the various traps or seals stand closed, as shown. It, now, liquid be poured into the bowl to be flushed, it passes down the outlet-pipe, and passing the air cutoff d therein flows past the lower extremity of the air-pipe and continues to flow downwardly and outwardly through the on tlet-pipe and through the second seal thereof. Inasmuch as the air-seal in the outletpipe next the bowl prevents the passage of air from the bowl, it isobvious that when the water introduced into the outlet-pipe and flowing through it, as described, drives the air therein before it a more or less complete vacuum will thereby be caused in the outlet-pipe, and the air from the air-pipe and from the long leg of the flushing-siphon expanding to fill the vacuum so created will be rarefied sufficiently to start the siphon automatically, the back-air cut-off in the siphon flushing- 0 pipe preventing the inrush of air from the bowl. Of the water thus descending the main portion will pass through the flushing-pipe and so thoroughly flush the bowl. After the flushing is terminated by reason of the siphon 5 in the iiushingtank breaking itself and the flushing-water has run off the Various traps or seals will be left closed in their normal condition. WVhen the outlet-pipe is so formed, as above explained, to contain a siphon upon the sewer side of the point of entrance of the air-pipe E, the short leg of which siphon is nearest tothe air-pipe, it is evident that the action of this siphon itself, when started by the fiow of water coming from the bowl, will aid in withdrawing the water from that portion ofthe outlet-pipe into which the air-pipe leads, and so will be efficient in producing the vacuum therein, upon which the operation of the structure depends.

It is obvious from what has already been said that the outlet-pipe should be so constructed and of such a capacity relatively tothe bowl thatthe amount of liquid which will be introduced into it inuse whenpass- 7 ing down the outlet-pipeima'y fill it fullbore,

be all that is required 'to'carry off the flushing-water. In the case of urinals, on the other hand, as the amount of liquid introduced into the bowl may be relatively small, it may be under certain circumstances necessary to em ploy an outlet-pipe of a capacity less than; that of the flushing-pipe which it is desired to use. Should this be the case an overflow; or supplemental outlet E may be provided, as shown in Fig. 2, and the outlet and overflow may of course be united, as shown, to avoid the expenseof running two separate pipes to the drain.

I claim 7 1. In an automatic flushing device, the combination, with the bowl to be flushed, of a supply-tank, a siphon flushing-pipe extending from the tank to the bowl, an outlet-pipe from the bowl, an air-pipe extending from the long leg of the siphon flushing-pipe to the outlet-pipe, a back-air cut-off in the long leg of the flushing-pipe on the bowl side of the point of entrance of the air-pipe, and two airseals in the outlet-pipe located, respectively, on the bowl side and 011 the sewer side of the .point of junction therewith of'the air-pipe,

all substantially as. set forth.

2. In an automatic flushing device, the combination, with the bowl to be flushed, of a supply-tank, a siphon flushing-pipe extending from the tank tothe bowl, an outlet-pipe from the bowl, an air-pipe extending from the long leg of the siphon flushing-pipe to the outlet-pipe, a back-air cut-off in the long leg of the flushingpipe onthe bowl side of the point of entrance of the, air-pipe, and an airseal in the outlet-pipe located on the bowl side of the point of juncture-therewith of the air-pipe, and a second, air-seal therein on the sewer side of said point or juncture, this latter air-seal consisting of a siphon, substantially as described.

In testimony whereof Ihave-hereunto subscribed my name this 21st day. of May, A. D. 1889.

' HENRY O. WEEDEN.

Witnesses:

ELLEN B. ToMLINsoN, JOHN H. TAYLOR. 

